<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <title>登录页面</title>
    <style>
        body {
            text-align: center;
            margin-top: 50px;
            font-family: Arial, sans-serif;
        }
        form {
            display: inline-block;
            background-color: #f4f4f4;
            padding: 20px;
            border-radius: 5px;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
        }
        input[type="text"], input[type="password"] {
            padding: 5px;
            width: 200px;
            margin-bottom: 10px;
        }
        button {
            padding: 5px 10px;
        }
    </style>
</head>
<body>
    <h1>登录页面</h1>
    <form action="index.html" method="get">
        <label for="username">用户名:</label>
        <input type="text" id="username" name="username" required>
        <label for="password">密码:</label>
        <input type="password" id="password" name="password" required>
        <button type="submit">登录</button>
    </form>
</body>
</html>